Pushing preflop with AA/KK

[miajag81]

Recently I have been experimenting with open-pushing preflop every time I get AA or KK at 50NL and 100NL, my usual games. It's been working pretty well as I'm getting a lot of donkey calls with stuff like AJ, 88, etc. Is this +EV in the long run? And by +EV I mean "more +EV than the standard open-raise?"

Obviously with more observant opponents at higher limits this would not work, but I have a feeling it might be the best play at small-stakes NL.